totally biased opinion on nutrition and insulin:
Well, well, well: A climate of deficiency http://www.nutritionalmagnesium.org/com ... ticle.html
"Why are we magnesium deficient? One reason is the dairy lobby and our high calcium intake—the two minerals need to be in balance. Another is that in the face of elevated insulin (estimated by many to be present over half of us), the kidneys waste magnesium.
Aside from the insulin connection and our love affair with fruit juices, convenience foods, low-fat muffins, Honey Nut Cheerios, beer and the like, there is a strong magnesium connection. The debate about whether magnesium deficiencies cause elevated insulin or vice versa is ongoing, but one thing is clear: both conditions are exceedingly common, and both need to be corrected if we're going to be thin and strong and well."
of course i fully agree with this clearly partial opinion
remind me if you have had a mag level done LC? that bit about the kidneys was news to me, interesting.